Heavy Construction

The Allen and Greenough is still under construction; so some links may not work quite the way you would expect.

51.

The following, not having e in the stem, insert it in the nominative singular and are declined like ager (§ 47): -

ager, field, stem agro-; coluber, snake; magister, master;
aper, boar; conger, sea eel; minister, servant;
arbiter, judge; culter, knife; oleaster, wild olive;
auster, south wind; faber, smith; onager (-grus), wild ass;
cancer, crab; fiber, beaver; scomber (-brus), mackerel.
caper, goat; liber, book;